Is it legal for large, multi-crew, aircraft (such as the A380 or B747) to go VFR? I would guess it's legal just as any other aircraft. Is this ever done, like during training or test-flights? If it isn't legal, what's the limiting factor?
I'm talking real VFR from take-off to landing, not an VFR-on-top IFR clearance.
As I don't have a spare 747 sitting around waiting for me to take it out for an afternoon spin, I'm interested more in the general sense, is it legal anywhere, and are airlines taking advantage of it?